Crusher.



E. FRIEDRICH.

CRUSHER.

APPLICATION FILED MAYB, 1912.

Patented N 0V. 11, 1913.

2 BHEETBSHEET 1.

ganja W E. FRIEDRICH.

GRUSHER.

APPLIOATIQN FILED MAYS, 1912.

1,078,342, Patented Nov. 11, 1913.

2 SHEETS-SHEET 2.

may.

Figs. 1 and 2 UNITED srarss EXETENT OFFICE.

Eritrean Estimates, on LEIPZIG-PLAGWIIZ,GERMANY.

(JR/USHER.

many, have invented certain new and useful. Improvementsin Crushers, of which the following is a full, clear, and exact description. My invention relates to improvements 1n i crushers, and more particularly to that class of crushers in which two stationary jaws each cotiperating with a reciprocating movable aw are disposed one above the other, so

that the upper pair of jaws has the function of breaking up the material to be crushed into pieces of a certain SlZe,Wh1l6 the lower pairof jaws has thefunction of reducing the material supplied thereto from the upper pair to the desired degree of fineness.

The object of the improvements is to provide a crusher of this class in which a comparatively small number of bearings is required,- and in which therelative distances of the jaws of each pair at the lower ends thereof can conveniently be adjusted independently of each other, so that the lower movable jaw can be set according to the de1- sired degree of fineness of the material and without interfering with the crushing; et-

feet of the upper pair otjaws. v 1

With this and other ob ects in view my m vention consists in provlding an operative connection between the upper end of the lower movable jaw and the lower end of the upper movable jaw, or with an arm having a rockingmovement on the driving eccentric or cam, and providing a rear abutment for the lower movable jaw at the lower end thereof, the novel features of my invention being, particularly defined in the appended claims.

For the purpose of explaining'ythe invention several examples embodying the same iave been shown in the accompanying draw-.

same letters otreference ings, in which the the views to indicate have been used in all corresponding parts.

In said drawings-Figure lyis a vertical section ofthe crusher taken on the line A-B of Fig. 9., Fiq'. 2, is a plan of the crusher shown in Fig. 1, Fig. 3, is a partial vertical section illustratinga modification of the crusher shown in Figs. 1 and 2, and

Fig. 4., is a vertical section of a further modification of the crusher.

Referring tothe example illustrated in of the drawings, the frame of Specification of Letters Patent.

Application filed May 8, 1912. Serial No. 695,922.

tegralwith the and it isadjusted toward and away from groove Patented Nov. 1 1,1 913.

the crusher consists of an upper section 1 and a lower section 2 secured to or made in tegral with each other. The upper section 1 is formed by longitudinal walls 3 and 4 per section are provided with bearings for a transverse driving shaft 8 which atopposite ends carries fly wheels 11 and 12, and at one end loose and fast pulleys 9 and 10 respectively. The part ofthe shaft intermediate the walls 3 and i is in the form of an eccentric 13 on which an eccentric st 'aplli having an arm 15 is mounted. By the rotation of the shaft 8 reclprocating movement is imparted to the arm 15. Laterally of the support or fulcrum 8 a shaft 27 ismounted on the longitudinal walls 3 and i on which support is mounted to rock a movable crusher jaw 26, which cooperates with a preferably vertical stationary jaw 31 secured to the transverse wall 5. Reciprocating movement is imparted to the jaw 26 from the eccentric arm mechanism. The latter consists of pressure plates 19 and 2? fitting with one of their edges in rounded grooves 16 and 17 at the lower end of the arm 15 and withtheir opposite edgesrespectively in a similar groove 95 of the movable jaw 26 and a groove 21 formed in the front face of an adjustable wedge block The latter is guided between lugs 22, 22 secured to or made inlongitudinal walls 3 and i,

the arm 15 by means of a wedge block 23 engaging the wedge block 22 at 1ts rear and adapted tobe shifted vertically by means of one or more ad usting screw bolts 24 passing; through one or more lugs 24:. Below the 25 the movable crusher jaw 26 is equipped with a. hook 28. which is engaged by a rod 29 acted upon by a spring rod 29 and spring 30 having the tendency to retract the movable jaw avay from the stationary jaw 31. y

At its lower end the movable jaw 26 is formed with a pair oi eyes 32 within which a pin 33 is mounted. On thelatter is pivotally mounted the upper end of the lower movable jaw 3i, which at its lower end is formed with a series of rounded grooves 35.

15 by means of a toggle 30, the i Any one of the said grooves is engaged by one edge of a pressure plate 36 which with its opposite edge engages one of a series of similar grooves 37 formed in an abutment plate 38. The latter is horizontally guided between upper and lower lugs 38, and it is adapted to be adjusted toward and away from the movable jaw by means of a wedge block 39 engaged by an adjusting screw bolt 40.

The lower movable jaw 34 cooperates with a stationary jaw 41 secured to the transverse wall 5. As shown the said stationary jaw is disposed in inclined position so as to approach with its lower end the transverse Wall 5', and the lower movable jaw is inclined at an angle to the vertical which is larger than the angle of inclination of the upper movable jaw 26. The stationary jaw 41 thus has an overhanging surface, which greatly facilitates the falling off of any crushed material that may stick to said stationary jaw. Below the series of grooves 35 a hook 42 is secured to the lower movable jaw 34, and this hook is engaged by a rod 43 acted upon by a spring 44, which rod and spring tend to retract the movable jaw away from the stationary jaw 41.

The operation of the crusher shown in Figs. 1 and 2 is as follows: Rotation of the shaft 8 imparts movement to the upper movable jaw 26 by the tog le mechanism consisting of the arm 15 an the pressure plates 20 and 19, so that the said movable jaw is rocked on the fulcrum 27 toward and away from the stationary jaw 26, and the lower movable jaw 34 takes part with its upper end in such reciprocating movement since it is connected with its upper end to the upper movable jaw 26 by the pin 33.- The left-hand edge of the plate 36 forms a fulcrum for the movable lower 'aw 34. Thereby the material to be crushe such as ore, is

reduced between the upper jaws in a preliminary way, whereupon -it falls between the lower jaws 34 and 41, where it is reduced to the desired degree of fineness. As the lower jaws 34, 41 are inclined at a larger angle than the upper jaws 26, 31, the mate rial remains between the lower jaws a sufficient length of time to be uniformly reduced to the desired degree of fineness.

By adjusting the screw bolts 24 the discharge opening from the upper crusher jaws can be adjusted, whereby the crushing effect of the upper jaws is regulated. In a similar way the discharge opening from the lower jaws can be adjusted by means of the lower screw bolts 40. Thereby the degree of fineness of the material finally discharged from the crusher can be regulated, so that a material is obtained which is either in the form of powder, or of fine or coarse granules. It will readily be understood, that the upper and lower jaws are adjusted independently of each other, so that for instance when regulating the degree of fineness of the lower jaws the crushing effect of the upper jaws is not altered. This independent adjustment of both jaws is furthermore important in cases where the upper and lower jaws are not uniformly worn.

By placing the lower pressure plate 36 in either one of the grooves 35 and 37 disposed one above the other the crushing stroke of the lower end of the lower movable jaw can be adjusted independently of the stroke at the lower end of the upper movable jaw 26, as may be required for example in view of the character of the material to be crushed.

In the position of the parts shown in Fig. l in which the pressure plate 36 engages the lowermost grooves 35 and 37 the stroke of the lower end of the movable jaw 34 is almost zero. By placing the said pressure plate within one of the upper grooves 35, 37 the stroke at the lower end of the lower movable jaw is increased, because the leverage below the pressure plate 36 providing a fulcrum for the movable jaw is thereby increased, while the leverage above the said fulcrum is reduced. As shown in Fig. 1 the series of grooves 35 and 37 are disposed parallel to each other, so that the same pressure plate 36 can be used in any of the grooves. If desired the said series of grooves may be arranged at an angle to each other as has been illustrated in Fig. 3, in which the grooves 37 provided in the abutment block 38 are disposed in a vertical plane. If in this case it is desired to change the crushing stroke at the lower end of the lower movable jaw 34, pressure plates 36*, 36 or 36 of difierent lengths are placed into the corresponding grooves 35, 37", as has been indicated in Fig. 3 in dotted lines.

The driving mechanism of the upper movable jaw may be modified in various ways. For example, the rocking movement may be imparted to the said jaw by a shaft taking the place of the support 27 and equipped with a cam disk connected with the upper jaw. In this case the upper movable jaw may at the same time be acted upon by the eccentric 13, eccentric strap 14, and arm 15 provided on the shaft 8 and the pressure plates 19 and 20 cooperating therewith, or the said shaft, the eccentric, and one of the pressure plates may entirely be omitted, in which case the jaw 26 is fulcrumed by means of a single pressure plate on a stationary block which corresponds to the block 22 as shown in Fig. 1.

In Fig. 4 I have shown an example in which the lower movable aw is directly connected to the eccentric-arm 15 by means of a pivot pin 33 or the like. This construction operates on the same principle as those described above. The pivot pin 33 connects the lower jaw 34 with an extension 45 ofthe arm 15. In this case also the upper movable jaw 26 may if desired be mounted with its upper end on a driving cam.

Apart from the parts specifically referred to the example shown in Fig. 4 is similar to that shown in Figs. 1 and 2, andcorresponding parts have received the same numerals of reference, so that a detailed description may be dispensed with.

I claim herein as my invention:

1. In a crusher, the combination with a pair of upper jaws and a pair of lower jaws adapted to receive the material being crushed from the upper pair, of a fulcrum for one of the jaws of the upper pair located at the upper end thereof, a fulcrum for one of the jaws of the lower pair located at the lower end thereof, and means, common to said fulcrumed upper and lower jaws, acting on the lower end of the upper jaw and the upper end of the lower jaw to impart rocking movement thereto.

2. In a crusher, the combination with upper stationary and movable jaws, and lower stationary and movable jaws adapted to receive the material beingcrushed from the upper jaws, of common means acting on the lower end of the upper jaw and on the upper end of the lower jaw to reciprocate said upper and lower movable jaws toward and away from the stationary jaws cooperating therewith, and means to adjust said movable jaws relatively to the stationary jaws cooperating therewith.

8. In a crusher, the combination with upper stationary and movable jaws, and lower stationary and movable jaws adapted to receive the material from the upper jaws, of a fulcrum for the upper end of the upper movable jaw, a fulcrum plate pivoted to a stationary part of the crusher and having a pivotal connection with the lower end of the lower movable jaw, and common operating means connected with the upper end of the lower movable jaw and with the lower end of the upper movable jaw, to impart motion to said jaws.

4. In a crusher the combination with a pair of upper jaws, and means to impart reciprocating movement to said jaws relatively to each other, of a pair of lower jaws both inclined from the vertical toward the same side thereof and adapted ;to receive material being crushed from the upper jaws, and means to impart crushing movement to said lower jaws relatively to each other.

5. In a crusher, the combination with upper and lower stationary jaws, of an upper movable jaw fulcrumed at its upperend and cooperating with said upper stationary jaw, a lower movable jaw fulcrumed at its lower end and cooperating with said lower stationary jaw, a pivotal connection between the upper end of the lower movable jaw and the lower end of the upper movable jaw, and means for actuating said movable jaws.

6. In a crusher, the combination with an upper movable jaw fulcrumed at its upper end, and a lower movable jaw fulcrumed at its lower end, of a pivotal connection between the upper end of said lower jaw and the lower end of said upper jaw, additional upper'and lower'jaws facing the above-mentioned jaws and cooperating therewith, and. means for effecting a relative movement of the cooperating jaws.

7. In a crusher, the combination with an upper movable jaw fulcrumed at its upper end, and a lower movable jaw fulcrumed at its lower end, of a reciprocating actuating member having a pivotal connection with the upper end of said lower jaw, and an operative connection with the lower end of said upper jaw, and additional upper and lower jaws facing the above-mentioned jaws and cooperating therewith.

8. In a crusher, the combination with converging upper jaws arranged to perform a prelimlnary crushing operation, of converging lower jaws adapted to receive the material from the upper jaws and to crush it further, the lower jaw which has an upwardly-facing Working surface, forming a greater angle with the vertical than the upper jaw which has an upwardly-facing working surface, and means for effecting a relative movement of the cooperating jaws to crush the material between them,

9. In a crusher, the combination with upper stationary and movable jaws, and lower stationary and movable jaws, adapted to receive the material from said upper jaws, of a fulcrum for one of the upper jaws, located at the upper end thereof, a fulcrum for one of the lower jaws located at the,

lower end thereof, and means, common to said fulcrumed upper and lower jaws, and acting directly on the lower end of said upper jaw and also acting directly on the upper end of said lower jaw, to impart a rocking movement to both movable jaws.

10. In a crusher, the combination with a pair of upper jaws and a pair of lower jaws adapted to receive the material from the upper pair, a fulcrum for one of the jaws of the upper pair located at the upper end thereof, a fulcrum for one of the jaws of the lower pair, located at the lower end thereof, and means, common to said ful crumed upper and lower jaws, and connected directly with the lower end of the upper jaw and also connected directly with the upper end of the lower jaw, to impart a rocking movement to said fulcrumed jaws. 11. In a crusher, the combination with a pair of upper jaws and a pair of lower .jaws adapted to receive the material from the upper pair, a fulcrum for the upper end of one of the upper jaws, a fulcrum for the lower end of one of the lower jaws, a pivotal connection between the upper end of said fulcrunied lower and the lower end of said iulcrunied upper jaw, and means, attached to said pivotal connection, for actuating said connected t'uleruined jaws.

12. In a crusher, the combination of a stationary upper jaw and a stationary lower jaw disposed at an angle to the said upper 10 jaw, movable upper and lower'jaws c0- operating with said stationary jaws, and means for operating the movable aws.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

EDUARD FRIEDRI OH.

\Vitnesses RUDOLPH FRIGKE, JULIUS FEUNOH. 

